31.39% is the change from 685 to 900
Calculation steps:
[( 900 - 685 ) ÷ 685] x 100 = 31.39%
Formula
Percentage change = [(900 - 685) / 685] x 100
Subtract the new number by the original number
900 - 685 = 215
215 ÷ 685 = 0.31386861313868614
0.31386861313868614 x 100 = 31.39%